Recently, I hosted a weekly webinar where the topic was about Active Directory. It was a geek walk down memory lane! One of the first books that I wrote, Active Directory Planning and Design, was written in the late 1990s, based on Windows 2000. It was a seminal work introducing Active Directory, network directory services, and even Group Policy Objects (GPOs) to the SMB IT Pro community. These were heady times, and the future was bright.